Brick-press



0. BQBAKER. BRICK MACHINE.

Nail- 08. I Patented Aug. 1, 1854..

V ooLLINs B. BAKER, or 'rnor, NEW YORK.

BRICK- PRESS.

Specification of Letters Patent No. 11,408, datedAugust 1, 1854:.

To all whom z't may concern .1 (v

Be itknown that I, CoLLINs B. BAKER, of

Troy, in the county of Rensse-laer, State 1 of New York,have invented a new and usefull Improvement 1 in Brick-Molding Machines; and I do hereby declare that. the following is a full, clear, and exact. de-

to the annexed drawings, making a part of this specification.

My invention consists in the peculiar construction or formation of the under pressing surface of the quadrant shaped: follower by which it is enabled to. give'a vertical and the same degree of pressure to the clay in the hopper near its outer surface or to the full extent of the are described in its motion as that given to the clay at or near its center of motion, thereby causing the clay to be forced with equal and uniform pressure throughout its whole mass, filling all parts and corners of the molds and producing brick of uniform density throughout their entire body; which result has not been heretofore attained by any press withthe use of only one follower moving on-a fixed center.

The accompanying drawings represent a hand press which in its general construction is the same as those in general use, the only difference being in the peculiar formation of the pressing surface of the follower.

Figure 1 represents a perspective view; Fig. 2, a longitudinal vertical section and Fig. 3 a detached view of the follower showing my improved construction of its press ing surface.

In each of these figures similar letters indicate the same parts.

A, A, represents a strong frame of timber.

B, B, are end frames or pieces connected together by the tie pieces C, (1..

D, is a grate arranged at the bottom of the chamber or hopper E, for the purpose of pressing the clay in the brick molds G, G.

F, F, is a frame hung at one end upon journals (a, a.) The other end rests upon the cams (b, 6.) (See Fig. 2). Arranged upon one end of this frame is a grating (0,) and friction rollers (d, (:3, cl,) and on the frame A, is arranged a grating (6.) These arefor the purpose of supporting the brick molds Gr, G, in their passage to, under, and from the press.

(f) is a guide for the purpose of guiding the brick molds under the press and preventing. the corner of the mold from striking ii; the frame.

H is a roller having flanged wheels running on journals at each end for the purpose of guiding it; over the rails (g, 9.) Each end of this roller is: connected, by connecting rods I, I, to the arms J, J, on the shaft K. scription of the same, reference being had L, is a lever handle securedto the end of ;the shaft. This arrangement of the roller, ;connecting rods, arms, and shaft is for the :PUI'POSG of bringing the brick molds under the press when the press is to be operated.

:iThis quadrant shaped follower is hung or lhlnged at its center angle or bearing by the hinges or ears (h, h) on the shaft (is) upon which it has motion.

O, O, are segment racks secured on the upper surface of the follower. P, P, are pinions mounted upon the shaft (6..) These pinions gear with the segment racks. (m) is a handle. is a catch to stop the rising motion of the follower when sufliciently up. This arrangement of racks pinions and handle is for the purpose of actuating the follower.

On the pressing surface of the follower N, (see Fig. 3) I form or provide two or more grooves or recesses (a and b) which extend the whole length and parallel with the eXis of motion of the follower and both having the form or curve of an arc of a circle of the same number of degrees but of different radii (61,) the one nearest thecenter of motion being about one half the radius of the other (6,) or in other words the radii of both of them is proportioned to the increase of their distance from the center of motion,

thus dividing the area of the pressing surface into two or more concave surfaces which bear such a proportion to that area and to the center of motion of the same as shall give a uniform and vertical pressure to the clay in the hopper throughout the entire pressing surface, causing the clay to be forced with equal and uniform pressure into all parts and corners of the mold so as to produce brick of uniform density throughout their entire body or of the same degree of density at their outer ends as at their inner ends, which with the use of this formof follower must necessarily be nearest the center of motion if the follower be of rectilinear form.

I am aware that an angular and a single circular formed concave has been given to the under surface of the quadrant shaped follower, which forms experience has shown produce an unequal and oblique pressure upon the clay, which has aconstant tendency to be forced out of the hopper, and the brick produced by such a pressure are not uniform in their density or of good quality and very frequently half of them in a single molding operation are imperfect and useless 'and distance from the cent-er of motion and the inevitable consequence is that imperfect brick must be formed, whereas with my improvement this is not the case, for the I groovedarcs (a and b) are proportioned to each other and to their increase of distance from the center of motion of the follower. Consequently the clay in the hopper will receive a degree of pressure proportionate to its bulk and the tendency which it would otherwise have to escape from the hopper or move otherwise in a vertical direction is destroyed.

I do not claim constructing a sector shaped follower with a rectilinear nor a single curved concave pressing surface; but

What I do claim and desire to secure by Letters Patent, isi Constructing it with a pressing surface of two circular or curved concaves, which are proportioned to the increase of the distance from the center of motion of the quadrant, substantially as in the manner and for the purposes set forth.

COLLINS B. BAKER.

Witnesses:

D. C. WooDoooK, I. S. BARNEY. 

